Amazing story/event. Skimming wikipedia, not sure there were orders disobeyed. Maybe some protocols not followed? Cool nonetheless. Thanks for mentioning.
WikipediaStanislav Yevgrafovich Petrov (Russian: Станисла́в Евгра́фович Петро́в; 7 September 1939 – 19 May 2017) was a lieutenant colonel of the Soviet Air Defence Forces who played a key role in the 1983 Soviet nuclear false alarm incident. On 26 September 1983, three weeks...
https://en.m.wikipedia.org/wiki/Stanislav_Petrov